... , Anti-myopia of the functional principle of the pen: a child bowed his head to write, the ... desktop at the standard distance (≥ 20CM), the smart pen writing function.Mr. Lin Health-Eye PenWen Lin is ... . Automatic Anti-short-sight and Anti-humpback Writing Pen is one of his patent for utility models. ... like. The mission of "Mr. Lin Health-Eye Pen" is to help adjust your kids incorrect sitting postures ...